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fix several formatting problems in upgrade guide

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Scott Lamb 2018-01-30 17:01:03 -08:00
parent 529aad9982
commit 7566b6a38b
1 changed files with 14 additions and 12 deletions
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guide/schema.md
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@ -26,12 +26,12 @@ read-only mode prior to deleting the old database.
First ensure there is sufficient space available for four copies of the
SQLite database:
# the primary copy, which will be upgraded
# a copy you create manually as a backup so that you can restore if you
1. the primary copy, which will be upgraded
2. a copy you create manually as a backup so that you can restore if you
discover a problem while running the new software against the upgraded
database in read-only mode. If disk space is tight, you can save this
to a different filesystem than the primary copy.
# internal copies made and destroyed by Moonfire NVR and SQLite during the
3. internal copies made and destroyed by Moonfire NVR and SQLite during the
upgrade:
* during earlier steps, possibly duplicate copies of tables, which
may occupy space both in the main database and the journal
@ -64,7 +64,7 @@ reports that it is not running:
Then back up your SQLite database. If you are using the default path, you can
do so as follows:
$ sudo -u moonfire-nvr cp /var/lib/moonfire-nvr/db/db{,.pre-upgrade}
$ sudo -u moonfire-nvr cp /var/lib/moonfire-nvr/db/db{,.pre-upgrade}
By default, the upgrade command will reset the SQLite `journal_mode` to
`delete` prior to the upgrade. This works around a problem with
@ -84,11 +84,11 @@ Run the upgrade procedure using the new software binary (here referred to as
`new-moonfire-nvr`; if you are installing from source, you may find it as
`target/release/moonfire-nvr`).
$ sudo -u moonfire-nvr new-moonfire-nvr --upgrade
$ sudo -u moonfire-nvr new-moonfire-nvr --upgrade
Then run the system in read-only mode to verify correct operation:
$ sudo -u moonfire-nvr new-moonfire-nvr --read-only
$ sudo -u moonfire-nvr new-moonfire-nvr --read-only
Go to the web interface and ensure the system is operating correctly. If
you detect a problem now, you can copy the old database back over the new one.
@ -114,10 +114,12 @@ for restore; neither are easy:
know about them and will not delete them. Your disk may become full.
You should find some way to discover these files and manually delete
them.
* undo the changes by hand. There's no documentation on this; you'll need
to read the code and come up with a reverse transformation.
Once you're confident of correct operation, delete the unneeded backup:
$ sudo systemctl rm /var/lib/moonfire-nvr/db/db.pre-upgrade
$ sudo systemctl rm /var/lib/moonfire-nvr/db/db.pre-upgrade
### Unversioned to version 0
@ -129,9 +131,9 @@ will also accept a version 0 database.
Version 0 makes two changes:
* it adds schema versioning, as described above.
* it adds a column (`video_sync_samples`) to a database index to speed up
certain operations.
* it adds schema versioning, as described above.
* it adds a column (`video_sync_samples`) to a database index to speed up
certain operations.
There's a special procedure for this upgrade. The good news is that a backup
is unnecessary; there's no risk with this procedure.
@ -143,8 +145,8 @@ Then use `sqlite3` to manually edit the database. The default
path is `/var/lib/moonfire-nvr/db/db`; if you've specified a different
`--db_dir`, use that directory with a suffix of `/db`.
$ sudo -u moonfire-nvr sqlite3 /var/lib/moonfire-nvr/db/db
sqlite3>
$ sudo -u moonfire-nvr sqlite3 /var/lib/moonfire-nvr/db/db
sqlite3>
At the prompt, run the following commands: